The plastic coating on the interior door grab handles on the MK4 Golf is very soft and over time can get badly scratched and worn away making the interior of the car look really shabby and tired.
I found some spray paint that will allow you to recoat them and get the handles looking good as new. This video shows you how
https://www.youtube.com/watch?v=x97MPs5Xd7I&feature=youtu.be